public with sharing class CookbookBot_GetOpenAppointments {

  @InvocableMethod(label='Get Open Appointments')
  public static List<List<Bot_Appointment__c>> getOpenAppointments(List<String> sEmails) {

    String sEmail = sEmails[0];

    // Get the list of new and scheduled appointments
    List<Bot_Appointment__c> appointments = [SELECT Id, Name, JobType__c, 
                                                    AppointmentDate__c, AppointmentSlot__c 
                                             FROM Bot_Appointment__c 
                                             WHERE Contact__r.Email =:sEmail 
                                             AND Status__c IN ('New','Scheduled')];

    // Create a list for the appointments
    // NOTE: This is a list of lists in order to handle bulk calls...
    List<List<Bot_Appointment__c>> appointmentList = new List<List<Bot_Appointment__c>>();

    // Add all the new and scheduled appointments to the list
    appointmentList.add(appointments);

    return appointmentList;
  }
}